<template>
    <div class="app-container">
        <!-- 添加讲师页面布局 -->
        <el-form label-width="120px">

            <el-form-item label="讲师名称">
                <el-input v-model="teacher.name"/>
            </el-form-item>

            <el-form-item label="讲师排序">
                <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
            </el-form-item>

            <el-form-item label="讲师头衔">
                <el-select v-model="teacher.level" clearable placeholder="请选择">
                <el-option :value="1" label="高级讲师"/>
                <el-option :value="2" label="首席讲师"/>
                </el-select>
            </el-form-item>

            <el-form-item label="讲师资历">
                <el-input v-model="teacher.career"/>
            </el-form-item>

            <el-form-item label="讲师简介">
                <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
            </el-form-item>

             <!-- 讲师头像 -->
            <el-form-item label="讲师头像">
                <!-- 头衔缩略图 -->
                <pan-thumb :image="teacher.avatar"/>
                <!-- 文件上传按钮 -->
                <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
                </el-button>

                <!--
                v-show：是否显示上传组件
                :key：类似于id，如果一个页面多个图片上传控件，可以做区分
                :url：后台上传的url地址
                @close：关闭上传组件
                @crop-upload-success：上传成功后的回调 
                    <input type="file" name="file"/>
                -->
                <image-cropper v-show="imagecropperShow" :width="300" :height="300"
                   :key="imagecropperKey" :url="BASE_API+'/eduoss/fileoss/upload'"
                   field="file" @close="close" @crop-upload-success="cropSuccess"/>
            </el-form-item>

            <el-form-item>
                <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>
<script>
import teacher from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
    components:{
        ImageCropper,
        PanThumb
    },
    data() {
        return {
            teacher:{
                name: '',
                sort: 0,
                level: 1,
                career: '',
                intro: '',
                avatar:``
            },
            //上传弹框是否显示
            imagecropperShow:false,
            imagecropperKey:0,//上传组件key值
            BASE_API:process.env.BASE_API, //获取dev.env.js里面地址
            saveBtnDisabled:false  // 保存按钮是否禁用

        }
    },
    created(){ //页面渲染之前执行
      this.init()
      console.log(this.BASE_API+'/eduoss/fileoss/upload')
    },
    watch:{  //监听
        $route(to,from){ //路由变化方式，路由发生变化，方法就会执行
            this.init()
        }
    },
    methods:{
        close(){ //关闭上传弹框的方法
            this.imagecropperShow = false
            //上传组件初始化
            this.imagecropperKey = this.imagecropperKey + 1
        },
        //上传成功方法
        cropSuccess(data){
            this.imagecropperShow = false
            //上传成功之后接口返回图片地址
            console.log(data.url)
            this.teacher.avatar = data.url
            //上传组件初始化
            this.imagecropperKey = this.imagecropperKey + 1
        },
        init(){
            //判断路径是否有id值,决定添加还是修改
            if(this.$route.params && this.$route.params.id){
                //从路径中获取id值
                const id = this.$route.params.id
                //调用根据id查询的方法
                this.getTeacherInfo(id)
            }else{ //路径没有id值，做添加
                //清空表单
                this.teacher = {
                    name: '',
                    sort: 0,
                    level: 1,
                    career: '',
                    intro: '',
                    avatar:``
                }
            }
        },
        getTeacherInfo(id){
            teacher.getTeacherInfo(id)
                .then(response=>{
                    this.teacher = response.data.item
                })
        },
        //保存按钮按下时，执行函数
        saveOrUpdate(){
            //判断修改还是查询
            if(!this.teacher.id){
               //添加
                this.saveTeacher()
            }else{
                
                 //修改
                this.updateTeacher()
            }
           
        },
        // 修改讲师的方法
        updateTeacher(){
            teacher.updateTeacherInfo(this.teacher)
                .then(response=>{  
                    //添加成功信息
                    this.$message({
                        type: 'success',
                        message: '修改成功!'
                    });
                    this.teacher = {}
                    //通过路由跳转回到列表页面
                    this.$router.push({path:'/teacher/table'})
                })
        },
       // 添加讲师的方法
        saveTeacher(){
            teacher.addTeacher(this.teacher)
                .then(response=>{  
                    //添加成功信息
                    this.$message({
                        type: 'success',
                        message: '添加成功!'
                    });
                    this.teacher = {}
                    //通过路由跳转回到列表页面
                    this.$router.push({path:'/teacher/table'})
                })
        }
    }
}
</script>
